Wikibase\Lib\Store\Sql\Terms\DatabaseUsageCheckingTermStoreCleaner Class Reference

Inheritance diagram for Wikibase\Lib\Store\Sql\Terms\DatabaseUsageCheckingTermStoreCleaner:

Collaboration diagram for Wikibase\Lib\Store\Sql\Terms\DatabaseUsageCheckingTermStoreCleaner:

Public Member Functions
	__construct (ILoadBalancer $loadbalancer, DatabaseInnerTermStoreCleaner $innerCleaner)
	cleanTermInLangIds (array $termInLangIds)
	Checks the provided TermInLangIds for existence and usage in either on both Items and Properties.

Private Member Functions
	findActuallyUnusedTermInLangIds (IDatabase $dbw, array $termInLangIds)
	Of the given term in lang IDs, find those that are not used by any other items or properties.

Private Attributes
	$innerCleaner
	$loadBalancer

Detailed Description

Copyright

GPL-2.0-or-later

Constructor & Destructor Documentation

__construct()

Wikibase\Lib\Store\Sql\Terms\DatabaseUsageCheckingTermStoreCleaner::__construct	(	ILoadBalancer	$loadbalancer,
		DatabaseInnerTermStoreCleaner	$innerCleaner
	)

Member Function Documentation

cleanTermInLangIds()

Wikibase\Lib\Store\Sql\Terms\DatabaseUsageCheckingTermStoreCleaner::cleanTermInLangIds

(

array

$termInLangIds

)

Checks the provided TermInLangIds for existence and usage in either on both Items and Properties.

Those that do actually exist and are unused are passed to an inner cleaner.

These steps are all wrapped in a transaction.

Parameters

array

$termInLangIds

Implements Wikibase\Lib\Store\Sql\Terms\TermStoreCleaner.

findActuallyUnusedTermInLangIds()

Wikibase\Lib\Store\Sql\Terms\DatabaseUsageCheckingTermStoreCleaner::findActuallyUnusedTermInLangIds ( IDatabase  $dbw, array  $termInLangIds  )

private

Of the given term in lang IDs, find those that are not used by any other items or properties.

Currently, this does not account for term in lang IDs that may be used anywhere else, e.g. by other entity types; anyone who uses term in lang IDs elsewhere runs the risk of those terms being deleted at any time. This may be improved in the future.

1) Iterate through the IDs that we have been given and determine if they appear to be used or not in either the property or item term tables. 2) Select FOR UPDATE the rows in the wbt_property_terms and wbt_item_terms tables so they lock and nothing will happen to them.

An alternative to this would be immediately lock all $termInLangIds, but that would lead to deadlocks. see T234948

Parameters

IDatabase	$dbw
int[]	$termInLangIds	(wbtl_id)

Returns

int[] wbtl_ids to be cleaned

Todo:

This should be factored out of this Cleaner into its own class

Member Data Documentation

$innerCleaner

Wikibase\Lib\Store\Sql\Terms\DatabaseUsageCheckingTermStoreCleaner::$innerCleaner

private

$loadBalancer

Wikibase\Lib\Store\Sql\Terms\DatabaseUsageCheckingTermStoreCleaner::$loadBalancer

private

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The documentation for this class was generated from the following file:

• lib/includes/Store/Sql/Terms/DatabaseUsageCheckingTermStoreCleaner.php